Rotary paper-cutter



2 Sheets Sheet 2.

(No Model.)

H. L. MELLOR. ROTARY PAPBRCUTTER.

Patented Nov. 14,1893.

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- drum through suitable intermediate mechanl:NITED STATES.

HIRAM L. MELLOR, OF LAVRENCE, MASSACHUSETTS.

" ROTARY PAP ER-CUTTER.

SPECIFICATION forming' part of Letters Patent No. 508,576, dated November 14, 1893.

Application filed April 15,1893.

To all whom, it may concern:

Be it known that I, HIRAM L. MELLOR, of Lawrence, county of Essex, State of Massachusetts, have invented an Improvement in Rotary Paper-Cutters,of which the following description, in connection with the accompanying drawings, is a specification, like letters and figures on the drawings representing like parts.

This invention relates to that class of paper cutting machines wherein the paper in web form is led through suitable feed rolls to a rotating feed drum, Whichdelivers the web to fixed and movable cutting blades to be cut thereby into sheets of desired length, the movable blade being mounted on a rotatable carrier which receives its motion from the feed ism, and my invention has forits object generally the simplifying of the various parts of the apparatus, and particularly the improvement of the mechanism connecting the feed drum and rotatable carrier.

In accordance therewith my invention consists, in a rotary paper cutter, of a rotatable cutter carrier, parallel actuating shafts geared respectively to said drum and carrier, and a friction surface rotatable with and longitudinally movable on each shaft,combined with a double cone having a common base, said friction surfaces lengaging the conical portions on opposite sides of their common base, and means to move the double cone longitudinally, whereby rotation of one friction surface is transmitted to the other with vary ing Speed, depending on the position of the double cone, substantiallyas will be described.

Other features of my invention will be hereinafter described and particularly pointed out in the claims.

Figure 1,in side elevationand partly broken out, represents a rotary paper cutter with my invention applied thereto. Fig. 2 is a view partly in section and broken out to save space, taken on the line w-x, Fig. 1, to be described, the cones and shafts being shown in elevation. Fig. 3 is a detail to be referred to and Fig. 4 is a detail View in elevation, taken at the left of Fig. 2, between the cone pulley P and bearing EX.

`:nished from any suitable source of power. shipper S is provided to move the belt P2 The frame-work A of suitable shape 4to sup.- port the co-operating parts of the apparatus,

serai No. 470,462. on man.)

is provided with bearings a. and .b' for the shafts aand h, of the feed drum B and cutter carrier C respectively, of usual construction, and the feed-rolls B', B', guide B2, bracket B2 supporting a presser-roll B4, delivering guide B5, and fixed and movable cutting blades cX and c are and may be of usual construction, and form no part of my invention, suitable means being provided for adjusting the various parts.

The drum B has secured thereto a gear a2, see Fig. l, in mesh with a gear a2, shown in dotted lines in Fig. l, and in full lines Fig. 2,

fast on the rear end 'of a shaft E, best shown in Fig. 2, supported in suitable bearings Secured to the frame-work A, said shaft having thereon a conepulley P, connected by a belt P2 with a reversed cone-pulley P', on a shaft P3 having its bearings p secured to the framework, and provided Withusual fast and loose pulleys, not shown, rotation thereof being fugfrom one to the other end of said cone pul-4 leys in usual manner, to vary the speed of the driven pulley P, and thereby the speed of the drum. Heretofore it has been usual to vary the speed of the drum from speed changingmechanism outside of the machine, but by my construction herein described I obtain a more compact and simple apparatus, more convenient to operate, and easier to regulate.

The shaft E, see Figs. 2 and 4, at its front end is provided with a sleeve e, rotatable therewith and longitudinally movable on the shaft inthe bearing EX, said sleeve having rigidly secured thereto outside of the bearing a disk or wheel E with a recessed periphery,

to receive therein an endless friction surface or belt of suitable material, herein shown as an annulus E2, the face thereof being the frustum of l,a cone of small altitude.- and large base, said base or annulus being forced onto the periphery of the wheel, whereby the Isame can be readily replaced when Worn by a new one. Collars e and c2, rigidly con-` nected by a rod e2, loosely embrace the shaft E, the collar e bearing against the end of the sleeve e to move longitudinally therewith, but not to rotate. A flexible cord e5 is attached at one end to the collar e2 and passes over a sheave e4 supported on the frame-work, and

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thence to a lever e6, pivoted to the frame at 2, an adjustable weight w being movable longrtudinally on the lever, as best shown in Flg. 3. The tendency of the weighted lever and intermediate connections is to keep the sleeve e and friction surface E2 pressed outwardly beyond the bearing EX, fora purpose to be described.

The cutter carrier C has secured thereto a gear b2, see Fig. 1, in mesh with a gear b2 on the rear end of a shaft F, parallel to and independent of the shaft E, said shaft F having alongitudinally movable sleeve f keyed thereon to be rotated by it, said sleeve projecting through the bearing F and having a wheel or disk F fast thereon outside of said bear- 1ng,-said disk carrying a frusto-conical annular friction surface F2, similar to the annulus E2. Collars f,f2, rigidly connected by rod f2, and loose on shaft F, are acted upon by a flexible connection f5 passed over ya sheave f4 and secured to a lever f6, said lever having an adjustable weight w thereon, the action of said weight maintaining the collar f pressed against the end of the sleeve f, and tending to force it outwardly through the bearing FX.

Brackets A, see Figs. l and 2, are secured to the frame-Work, supporting bearings A2 and A3 for a shaft D', having a double cone D fast thereon, the cones having a common base, and inclining oppositely, as shown, the shaft D being in the plane of the shafts E and F, and so located with relation to the friction surfaces E2 and F2 that they will simultaneously contact with the double cone D, on opposite sides of its greatest diameter or common base, the weights w and 1U', keeplng said friction surfaces always pressed against the double cone. The shaft D is longitudinally movable in its bearings, an externally threaded sleeve d provided with a hand wheel d3 being coupled to the shaft D by a set nut d2 entering an annular groove d in the shaft, so that the latter may rotate in the sleeve d. The bearing AB is internally threaded to engage the sleeve, and when the latter is rotated by the hand-wheel d3 the shaft and double cone D are moved in one or the other direction. By proper rotation of the sleeve the cone may be brought just intermediate the centers of the shaftsEand F, and the friction surfaces E2 and F2 will then bear on conical portions of the same diameter, so that if one surface be rotated at a given speed the other surface will be rotated at the same speed by or through the double cone. So, too, if the cone is so moved that the two surfaces contact with conical portions of different diameters, as shown in Figs. l and 2, the driven surface will be rotated at a faster or slower speedthan the driving surface. Consequently the speed of the driven surface may be varied with relation to the speed of the driving surface simply by changing the position of the double cone.

The double cone D is substantially tangent through the double cone D to the friction surface F2. Thus the speed of the cutter carrier can be varied relatively to the speed of the feed drum, whether the latteris rotated at the highest or lowest speed, so that the length of the sheets to be cut from the web can be regulated with great nicety and precision,the conical friction surfaces greatly increasing the accuracy and reliability of the mechanism, and the friction surfaces are constantly held against the double cone with a pressure which may be varied to suit the character of the Work.

This invention is not restricted to the speci fic construction of thevarious parts herein shown and described, as it is evident that the same may be somewhat altered, either in construction or arrangement, without departing from the spirit of my invention.

Iclaiml. A feed drum, a rotatable cutter carrier, parallel actuating shafts geared respectively to said drum and carrier, and a friction surface rotatable with and longitudinally movable on each shaft, combined with a double cone havinga common base, said friction surfaces engaging the conical portions on opposite sides of their common base, and means to move the double conelongitudinally,where by rotation of one friction surface is transmitted to the other with varying speed, depending on the position of the double cone, substantially as described.

2. A rotatable feed-dru m, a rotatable cutter carrier, independent parallel actuating shafts geared respectively to and to rotate said drum and carrier, a friction surface rotatable with andlongitudinally movable on each shaft, and means to normally move said surfaces outwardly, combined with a double cone intermediate said surfaces and engaged thereby on opposite sides of its common base, and means to Ymove the double cone longitudinally to present an increasing diameter to one, and a decreasing diameter to the other, of said friction surfaces, to vary the speed of the carrier with relation to the drum, substantially as described.

3. In a rotary paper cutter, a feed-drum, a power transmitting shaft geared thereto at one end and provided at its opposite end with a friction surface longitudinally movable thereon, a cutter-carrier, an actuating shaft therefor, and a friction surface longitudinally movable thereon, combined with a double cone in contact with and transmitting the rotation of one to the other of said friction sur- IOO faces, and means .to move said cone longitudinally, whereby the speed of the cutter may be varied with relation to the speed of the drum, substantially as described.

4. A drum actuating shaft, an independent carrier-actuating shaft, an annular frictionl surface rotatable with and longitudinally movable on each shaft, means to move said surfaces in one direction, combined with a shaft located at right angles to said actuating shafts and movable longitudinally, a double cone thereon in contact with both and transmit-l ting the rotation of one annular friction surface to the other, and means to move the cone shaft longitudinally, movement of the central portion of the double cone. toward afriction surface moving the latter inward upon its shaft, substantially as described.

5. In a rotary paper cutter, independent drum and carrier actuating shafts, a frustoconical friction surface lrotatable with and longitudinally movable on each shaft,Y and driving mechanism for the drum actuating shaft, combined with a double cone, having a common base, in engagement with said fric-Y and in .engagement with said friction surfaces on opposite sides of said base, and means to move the double cone longitudinally, the friction surfaces moving longitudinally on their shafts with or against the pressure applied to them as the cone is moved in one or combined with a reverse cone connected therewith, a shipper therefor, to alter the speed of the driven cone, a double cone engaged by saidfriction surfaces on opposite sides of its common base, and means to move said donble cone longitudinally, Wherebyrotation of one surface is transmitted to the other with varying speed, substantially as described.

8. In a rotary paper cutter, independent. actuating shafts, a Wheel having a recessed peripheryand a sleeve-like hub, rotated by and longitudinally movable on each shaft, and an annular belt or friction surface adapted to beforced onto the recessed periphery of each Wheel, combined with a double cone engaged by each of said friction surfaces, to transmit power from one tothe other, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses. Y

HIRAM L. MELLOR.

Witnesses:

JOSEPH BATTLES, WILLIAM SoMERvILLE. 

